Welcome to the lake! All great advice. I would add:
1. Always carry both your boater's license and your auto driver's license. Not that I know this from first-hand experience
, but Marine Patrol expects both should you be pulled over by them. They'll also always check that you have PFDs, a throwable float, working horn and a properly charged fire extinguisher.
2. In addition to having physical charts on board, I always have Navionics app up on my phone to confirm I'm where I think I am and which way to go around each spar buoy. Very reassuring, especially when traveling at night.
Enjoy!